Generally, the results of pregnancy tests that are two years out of date are inaccurate. After the expiration date, the test reagents contained in the test paper may change accordingly and lose their detection function, so the accuracy of the test results cannot be guaranteed. Therefore, it is not recommended to use expired test strips to detect pregnancy. If a woman wants to test whether she is pregnant or not, it is recommended to use test strips within the expiration date. Before testing, she should check whether the test strips are contaminated or soaked, and it is not recommended to use the test strips if they are abnormal. In addition, women can also go to the hospital to take a blood test for HCG (human chorionic gonadotropin) to determine whether they are pregnant. When taking or using medications, you should pay attention to the shelf life and use medications that are within the shelf life.